trn at Lobsters recently announced the existence of ban.ai public access Multics. Yes, that Multics. I wish this had been around a couple of years ago when I was writing my novel Silent Clarion in 2015. I had put my protagonist in the position of trying to crack a Multics installation. While Unix was ubiquitous in her setting, she had no experience with Multics. While I had used http://multicians.org/ for research, reading a website is no substitute for firsthand experience.